PHP Variable & Rules for PHP variables
PHP Variable :- A PHP variable is a symbol that can store a value of different types, such as numbers, strings, arrays, objects, etc. A PHP variable can be used to perform calculations, manipulate data, or display information on a web page.
Creating (Declaring) PHP Variables-:
In PHP, a variable starts with the $ sign, followed by the name of the variable:
<?php
$name= “Vishal Uttam”;
$age=26;
echo $name;
echo $age;
?>
After the execution of the statements above, the variable $name hold the value Vishal Uttam and the variable $age will hold the value 26.
When we assign a text value to a variable, we have to put quotes around the value.
Rules for PHP variables
A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume).
Rules for PHP variables:
- A variable starts with the $ sign, followed by the name of the variable.
- A variable name must start with a letter or the underscore (_) character.
- A variable name cannot start with a number.
- A variable name can only contain alpha-numeric characters and underscores(A-Z,0-9 and _ ).
- Variable names are case-sensitive ($age and $AGE are two different variables).
